/* ======================================================================
   Keystone Digital Holdings / Synchronicity site
   Art direction: serious infrastructure. Dark default. KDH-teal accent.
   Display: Cabinet Grotesk. Body: General Sans. Mono: JetBrains Mono.
   ====================================================================== */

:root {
  /* Type scale (fluid) */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl:  clamp(2.5rem, 1rem + 4vw, 5rem);
  --text-hero: clamp(3rem, 0.5rem + 7vw, 7rem);

  /* 4px spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radii */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 400ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Inter', system-ui, sans-serif;
  --font-body:    'General Sans', 'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;

  /* Content widths */
  --content-narrow: 680px;
  --content-default: 960px;
  --content-wide: 1180px;
}

/* ============================== DARK (default) =========================== */
:root,
[data-theme='dark'] {
  --color-bg:               #0a0d0e;
  --color-surface:          #11161a;
  --color-surface-2:        #161c20;
  --color-surface-offset:   #1a2126;
  --color-surface-offset-2: #20272d;
  --color-surface-dynamic:  #252d34;
  --color-divider:          #232a30;
  --color-border:           #2f3a41;
  --color-border-strong:    #485660;

  --color-text:         #e4e9ec;
  --color-text-muted:   #8a969d;
  --color-text-faint:   #5a6770;
  --color-text-inverse: #0a0d0e;

  --color-primary:           #5a8a8d;
  --color-primary-hover:     #6fa3a6;
  --color-primary-active:    #4a7679;
  --color-primary-highlight: #1a2628;
  --color-primary-on:        #0a0d0e;

  --color-accent-warm: #c08866; /* used sparingly for state */
  --color-success:     #6daa45;
  --color-warning:     #bb653b;
  --color-error:       #d16363;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.55);

  --grid-line: rgba(90, 138, 141, 0.07);
}

/* ============================== LIGHT ==================================== */
[data-theme='light'] {
  --color-bg:               #f7f7f4;
  --color-surface:          #ffffff;
  --color-surface-2:        #fbfbf8;
  --color-surface-offset:   #eeeeea;
  --color-surface-offset-2: #e4e4df;
  --color-surface-dynamic:  #d8d8d3;
  --color-divider:          #e6e6e1;
  --color-border:           #d4d4ce;
  --color-border-strong:    #989892;

  --color-text:         #14181b;
  --color-text-muted:   #5a656c;
  --color-text-faint:   #95a0a7;
  --color-text-inverse: #f7f7f4;

  --color-primary:           #3d5a5c;
  --color-primary-hover:     #2d4748;
  --color-primary-active:    #1f3334;
  --color-primary-highlight: #d8e2e1;
  --color-primary-on:        #ffffff;

  --color-accent-warm: #b06840;
  --color-success:     #437a22;
  --color-warning:     #964219;
  --color-error:       #a12c2c;

  --shadow-sm: 0 1px 2px rgba(20,24,27,0.06);
  --shadow-md: 0 4px 16px rgba(20,24,27,0.08);
  --shadow-lg: 0 16px 48px rgba(20,24,27,0.12);

  --grid-line: rgba(61, 90, 92, 0.07);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:               #f7f7f4;
    --color-surface:          #ffffff;
    --color-surface-2:        #fbfbf8;
    --color-surface-offset:   #eeeeea;
    --color-surface-offset-2: #e4e4df;
    --color-surface-dynamic:  #d8d8d3;
    --color-divider:          #e6e6e1;
    --color-border:           #d4d4ce;
    --color-border-strong:    #989892;
    --color-text:         #14181b;
    --color-text-muted:   #5a656c;
    --color-text-faint:   #95a0a7;
    --color-text-inverse: #f7f7f4;
    --color-primary:           #3d5a5c;
    --color-primary-hover:     #2d4748;
    --color-primary-active:    #1f3334;
    --color-primary-highlight: #d8e2e1;
    --color-primary-on:        #ffffff;
    --shadow-sm: 0 1px 2px rgba(20,24,27,0.06);
    --shadow-md: 0 4px 16px rgba(20,24,27,0.08);
    --shadow-lg: 0 16px 48px rgba(20,24,27,0.12);
    --grid-line: rgba(61, 90, 92, 0.07);
  }
}

/* ============================== LAYOUT BASE ============================== */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-10));
}

.container--narrow { max-width: var(--content-narrow); }
.container--default { max-width: var(--content-default); }

.section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
}

.section--tight {
  padding-block: clamp(var(--space-10), 6vw, var(--space-16));
}

/* ============================== TYPOGRAPHY =============================== */
.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.eyebrow::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--color-primary);
}

h1.display, h2.display {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.05;
}

h1.display { font-size: var(--text-hero); }
h2.display { font-size: var(--text-2xl); }

h2.section-title {
  font-family: var(--font-display);
  font-weight: 500;
  letter-spacing: -0.02em;
  font-size: var(--text-xl);
  line-height: 1.15;
  margin-top: var(--space-3);
}

h3.subsection {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-lg);
  line-height: 1.25;
  letter-spacing: -0.01em;
}

.lede {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  line-height: 1.5;
}

.body-text {
  color: var(--color-text);
  font-size: var(--text-base);
  max-width: 68ch;
}

.body-text--muted {
  color: var(--color-text-muted);
}

.mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
  letter-spacing: -0.01em;
}

.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }

/* ============================== HEADER =================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--color-divider);
}
.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  height: 64px;
}
.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-text);
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-base);
  letter-spacing: -0.01em;
}
.site-header__brand:hover { color: var(--color-primary); }

.site-header__logo {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
}

.site-nav {
  display: flex;
  gap: var(--space-6);
  align-items: center;
}
.site-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: 0.01em;
}
.site-nav a:hover { color: var(--color-text); }
.site-nav a[aria-current='page'] { color: var(--color-text); }

.header-actions {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.theme-toggle {
  width: 36px; height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-2);
}

.mobile-toggle {
  display: none;
  width: 36px; height: 36px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  border-radius: var(--radius-sm);
}
.mobile-toggle:hover { background: var(--color-surface-2); }

@media (max-width: 768px) {
  .site-nav {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-4) 0;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-interactive), transform var(--transition-interactive);
  }
  .site-nav[data-open='true'] {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .site-nav a {
    padding: var(--space-3) clamp(var(--space-5), 5vw, var(--space-10));
    font-size: var(--text-base);
  }
  .mobile-toggle { display: inline-flex; }
}

/* ============================== HERO ===================================== */
.hero {
  position: relative;
  padding-block: clamp(var(--space-20), 14vw, var(--space-32));
  overflow: hidden;
  border-bottom: 1px solid var(--color-divider);
}

.hero__grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: -1px -1px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 30%, transparent 75%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
}

.hero__headline {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-hero);
  line-height: 1.02;
  letter-spacing: -0.03em;
  max-width: 20ch;
}

.hero__headline .accent {
  color: var(--color-primary);
}

.hero__sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 58ch;
  margin-top: var(--space-2);
}

.hero__cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

/* ============================== BUTTONS ================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: var(--text-sm);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  white-space: nowrap;
  line-height: 1.2;
}
.btn--primary {
  background: var(--color-primary);
  color: var(--color-primary-on);
  border-color: var(--color-primary);
}
.btn--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-border-strong);
  background: var(--color-surface-2);
}
.btn--small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}
.btn .arrow {
  transition: transform var(--transition-interactive);
}
.btn:hover .arrow { transform: translateX(2px); }

/* ============================== CAPABILITY TILES ========================= */
.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-10);
}

.tile {
  position: relative;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: border-color var(--transition-interactive), transform var(--transition-interactive);
  text-decoration: none;
  color: inherit;
}
.tile:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}
.tile__num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.08em;
}
.tile__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  color: var(--color-text);
}
.tile__body {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ============================== PROBLEM LIST (architecture page) ========= */
.section-divider {
  margin-block: var(--space-20) var(--space-10);
  border: none;
  border-top: 1px solid var(--color-divider);
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-2);
}

.section-h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-10);
  max-width: 28ch;
}

.problem {
  padding: var(--space-6) 0;
  border-top: 1px solid var(--color-divider);
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: var(--space-5);
  align-items: start;
}
.problem:last-child { border-bottom: 1px solid var(--color-divider); }

.problem__num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  padding-top: var(--space-1);
  letter-spacing: 0.05em;
}

.problem__title {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: -0.005em;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.problem__maps {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  letter-spacing: 0;
}
.problem__maps::before {
  content: 'MAPS TO ';
  color: var(--color-primary);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.problem__body {
  font-size: var(--text-base);
  color: var(--color-text);
  max-width: 72ch;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .problem {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
}

/* ============================== STANDARDS GRID =========================== */
.standards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-5);
  margin-top: var(--space-10);
}

.standard-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.standard-card__id {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  color: var(--color-primary);
  text-transform: uppercase;
}
.standard-card__name {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-lg);
  letter-spacing: -0.01em;
  color: var(--color-text);
}
.standard-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
  flex: 1;
}
.standard-card__how {
  font-size: var(--text-sm);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-divider);
  color: var(--color-text);
}
.standard-card__how strong {
  color: var(--color-primary);
  font-weight: 500;
}

/* ============================== RESOURCES ================================ */
.resource-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-10);
}

.resource {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  gap: var(--space-6);
  align-items: center;
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: border-color var(--transition-interactive);
}
.resource:hover { border-color: var(--color-primary); }
.resource__icon {
  width: 48px; height: 48px;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-sm);
}
.resource__meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-1);
}
.resource__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-1);
  letter-spacing: -0.01em;
}
.resource__desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}
.resource__cta {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

@media (max-width: 640px) {
  .resource {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  .resource__cta { text-align: left; }
}

/* ============================== FOOTER =================================== */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-16) var(--space-10);
  background: var(--color-surface);
  margin-top: var(--space-24);
}
.site-footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-10);
}
@media (max-width: 768px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
  }
  .site-footer__brand { grid-column: 1 / -1; }
}
.site-footer__brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.site-footer__kdh-logo {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}
.site-footer__kdh-logo img {
  height: 56px;
  width: auto;
}
.site-footer__brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  max-width: 36ch;
  line-height: 1.55;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
  font-weight: 500;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-col a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
}
.footer-col a:hover { color: var(--color-text); }

.site-footer__legal {
  margin-top: var(--space-12);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
}

/* ============================== PROSE / PAGE INTRO ======================= */
.page-intro {
  padding-block: clamp(var(--space-16), 10vw, var(--space-24));
  border-bottom: 1px solid var(--color-divider);
}
.page-intro h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-2xl);
  letter-spacing: -0.025em;
  line-height: 1.05;
  margin-top: var(--space-3);
  max-width: 18ch;
}
.page-intro__sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin-top: var(--space-5);
  line-height: 1.5;
}

.prose {
  max-width: 70ch;
}
.prose p {
  font-size: var(--text-base);
  color: var(--color-text);
  margin-bottom: var(--space-5);
  line-height: 1.7;
  max-width: none;
}
.prose p.muted { color: var(--color-text-muted); }
.prose h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}
.prose h3 {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-lg);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}
.prose a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }
.prose a:hover { color: var(--color-primary-hover); }
.prose ul {
  margin-bottom: var(--space-5);
  padding-left: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.prose li { line-height: 1.6; }
.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  padding: 0.15em 0.4em;
  background: var(--color-surface-offset);
  border-radius: var(--radius-sm);
  color: var(--color-text);
}

/* ============================== HOME CTA STRIP =========================== */
.cta-strip {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: clamp(var(--space-8), 6vw, var(--space-16));
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-8);
  align-items: center;
}
@media (max-width: 768px) {
  .cta-strip { grid-template-columns: 1fr; }
}
.cta-strip h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-xl);
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin-bottom: var(--space-3);
  max-width: 24ch;
}
.cta-strip p {
  color: var(--color-text-muted);
  font-size: var(--text-base);
  max-width: 50ch;
}
.cta-strip__actions {
  justify-self: end;
}
@media (max-width: 768px) {
  .cta-strip__actions { justify-self: start; }
}

/* ============================== ABOUT BIO ================================ */
.bio-grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-16);
  align-items: start;
  margin-top: var(--space-16);
}
@media (max-width: 768px) {
  .bio-grid { grid-template-columns: 1fr; gap: var(--space-10); }
}
.bio-grid--single { grid-template-columns: 1fr; }
.bio-grid__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
}
.bio-grid__meta dt {
  color: var(--color-primary);
  text-transform: uppercase;
  margin-bottom: var(--space-2);
  letter-spacing: 0.08em;
}
.bio-grid__meta dd {
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  letter-spacing: 0;
}

/* ============================== CONTACT ================================== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-12);
}
.contact-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.contact-card__label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.contact-card__value {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--color-text);
  margin-bottom: var(--space-3);
  font-weight: 500;
  letter-spacing: -0.01em;
  word-break: break-word;
}
.contact-card__value a { color: inherit; text-decoration: none; }
.contact-card__value a:hover { color: var(--color-primary); }
.contact-card__note {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.55;
}

/* ============================== UTILITIES ================================ */
.kicker {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  border-radius: var(--radius-sm);
}

.divider-tight {
  height: 1px;
  background: var(--color-divider);
  border: none;
  margin-block: var(--space-12);
}

/* Bio body helpers */
.bio-grid__body h2.bio-grid__heading {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  letter-spacing: -0.015em;
}
.bio-grid__body h2.bio-grid__heading:first-child { margin-top: 0; }
.bio-grid__body p {
  color: var(--color-text-muted);
  line-height: 1.65;
  margin-bottom: var(--space-4);
  font-size: var(--text-base);
}
.bio-grid__body ul {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-4) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.bio-grid__body ul li {
  position: relative;
  padding-left: var(--space-5);
  color: var(--color-text-muted);
  line-height: 1.6;
  font-size: var(--text-base);
}
.bio-grid__body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 10px;
  height: 1px;
  background: var(--color-primary);
}
.bio-grid__body ul li strong {
  color: var(--color-text);
  font-weight: 600;
}

/* Resource body grouping (allow text to fill middle column) */
.resource__body {
  min-width: 0;
  display: block;
}
.resource__body .resource__meta { margin-bottom: var(--space-2); }
.resource__body .resource__title { margin-bottom: var(--space-2); }

/* AISVS expanded card */
.standard-card--span {
  grid-column: 1 / -1;
}
.aisvs-chapter-list {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 var(--space-4) 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: var(--space-3) var(--space-6);
}
.aisvs-chapter-list li {
  font-size: var(--text-sm);
  line-height: 1.55;
  color: var(--color-text-muted);
  padding-left: 0;
  position: relative;
}
.aisvs-id {
  display: inline-block;
  min-width: 2.25em;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  margin-right: var(--space-2);
  padding: 2px 6px;
  background: var(--color-primary-highlight);
  border-radius: var(--radius-sm);
  text-align: center;
}
.aisvs-note {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  font-style: italic;
  margin: var(--space-3) 0;
  padding-top: var(--space-3);
  border-top: 1px dashed var(--color-divider);
}
.aisvs-contributor {
  font-size: var(--text-sm);
  color: var(--color-text);
  margin-top: var(--space-3);
}
.ieee-status {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 1px 6px;
  border-radius: var(--radius-sm);
  margin-left: var(--space-2);
  vertical-align: 2px;
}
.ieee-status--published {
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  border: 1px solid var(--color-primary-soft, transparent);
}
.ieee-status--draft {
  color: var(--color-text-faint);
  background: transparent;
  border: 1px solid var(--color-divider);
}
.ieee-group-heading {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin: var(--space-4) 0 var(--space-2);
}
.ieee-group-heading:first-child {
  margin-top: var(--space-2);
}
.posture-line {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}
.posture-chip {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  background: var(--color-primary-highlight);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}